Comprehensive Assessment of Pile Integrityand Defect Treatment of Large Diameter Cast-in-place Pile
The integrity of the pile body is one of a key factors that restricts the bearing capacity of large-diameter cast-in-place piles.Taking a project in eastern Fujian as an example,this paper analyzes the characteristics of low strain,crosshole sonic logging,and drilling core method,and uses multiple detection methods to comprehensively analyze and determine the integrity category.Analyze and handle the causes of defects based on the detection results.The research results indicate that in engineering practice,multiple detection methods should be comprehensively ap-plied to analyze the distribution proportion of defects in the horizontal and vertical directions of the pile body,and the type and severity of defects should be considered to comprehensively analyze and determine the integrity category;It is feasible and effective to use the double tube high-pres-sure grouting method to treat the local defects in the deeper part of the large-diameter cast-in-place pile by drilling the core hole.
Large diameter cast-in-place pileLow strain methodCrosshole sonic loggingCore drilling methodDouble tube high-pressure grouting method
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